Abstract
Four oxide dispersion strengthened Fe-(13-14 at.%) Cr ferritic compositions were exposed in air and air with 10 vol.% water vapor for up to 10000 h at 700-1100 °C. At 700-800 °C in air, the reaction rates were very low for all of the alloys compared to stainless steels. At 900 °C, a dispersion of Y2O3, compared to Al2O3, showed a distinct benefit in improving the oxidation resistance, due to a reactive element effect. However, failure occurred after 7000 h at 900 °C when only 13% Cr was present. The absence of Ti and W in one alloy appeared to result in a thinner reaction product after oxidation at 800 °C. One composition was exposed in 10 vol.% water vapor at 800 and 900 °C and in air at 1000 and 1100 °C. Under both of these conditions, there was a significant increase in the rates of oxidation. With the relatively low Cr contents in these alloys, their corrosion-limited operating temperature in air is near 900 °C.
| Original language | English |
|---|---|
| Pages (from-to) | 763-768 |
| Number of pages | 6 |
| Journal | Journal of Nuclear Materials |
| Volume | 307-311 |
| Issue number | 1 SUPPL. |
| DOIs | |
| State | Published - Dec 2002 |
Funding
The research was sponsored by the Office of Fusion Energy Sciences, US Department of Energy (DOE), under contract DE-AC05-00OR22725 with UT-Battelle, LLC. G. Garner, L. Walker and H. Longmire assisted with the experimental work. P.F. Tortorelli and S.J. Zinkle provided comments on the manuscript.